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Heat pumps · Error codes

Aira heat pump error codes

Aira · An established brand in the UK. 8 codes across 1 product family, each taken from the manufacturer’s manuals. Aira technical support ↗

Find a Aira engineer →8 codes · reviewed 23 September 2026

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Type the code on your display or a word from its meaning. Each code opens its own page with what it means, whether it is safe and what you can check.

8 codes

CodeMeaningStops?Homeowner check?
APP-CRITICAL-ERROR
Heat pump has stopped working and is no longer providing heat or hot water
YesYes
APP-ERROR
Issue with the heat pump system that is not impacting its ability to heat the home and hot water
NoYes
LIGHT-ATTENTION
Attention - check your app for more info
NoYes
LIGHT-PULSATING-RED-CENTRE
Error - check your app for more info
Not statedYes
LIGHT-PULSATING-RED-LEFT
Error acknowledged remotely by a Clean Energy Technician - check your app for more info
Not statedYes
OVERHEAT-PROTECTION
Overheating protection activates to protect the indoor unit from damaging heat levels; must be physically reset after the incident is solved
PartlyYes
THERMOSTAT-DISCONNECTED
The thermostat has either failed to connect to the heat pump or has lost its connection
NoYes
THERMOSTAT-LOW-BATTERY
Batteries must be replaced soon
NoYes